## The Elements of Euclid, the parts read in the University of Cambridge [book 1-6 and parts of book 11,12] with geometrical problems, by J.W. Colenso1846 |

### Dentro del libro

Resultados 1-5 de 37

Página 153

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**proportionals**. When four magnitudes are**proportionals**, it is usually expressed by saying , the first is to the second as the third is to the fourth . VII . When of the equimultiples of four magnitudes ( ( 153 ) BOOK V. ... Página 154

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**proportionals**, the first is said to have to the third the duplicate ratio of that which it has to the second . XI . When four magnitudes are continued**proportionals**, the first is said to have to the fourth the triplicate ratio of that ... Página 155

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**proportionals**, so that they continue still to be**proportionals**: XIII . Permutando , or alternando , by permutation or alternately ; when there are four**proportionals**, and it is inferred , that the first is to the third as the second ... Página 156

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**proportionals**when taken two and two of each rank , and it is inferred , that the first is to the last of the first rank of magnitudes , as the first is to the last of the others . Of this there are the two following kinds , which arise ... Página 164

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**proportionals**, they are**proportionals**also when taken inversely . If A be to B as C is to D , then also , inversely , B shall be to A as D to C. Take of B , D , any equimultiples whatever , E , F , and of A , C , any equimultiples ...### Otras ediciones - Ver todas

The Elements of Euclid, the Parts Read in the University of Cambridge [Book ... Euclides Sin vista previa disponible - 2016 |

### Términos y frases comunes

ABCD angle ABC angle ACB angle BAC base base BC BC is equal bisected centre chord circle circle ABC circumference common described diameter difference divided double draw drawn equal angles equiangular equimultiples extremities fall figure fore four fourth given circle given line given point given straight line greater half inscribed intersection join less Let ABC lines be drawn lines drawn magnitudes manner meet multiple opposite sides parallel parallelogram pass perpendicular plane polygon PROB produced PROP proportionals Q.E.D. PROP ratio rectangle rectangle contained rectilineal figure right angles segment semicircle shew shewn sides similar square square of AC Take taken THEOR third touches the circle triangle ABC Wherefore whole

### Pasajes populares

Página 42 - To a given straight line to apply a parallelogram, which shall be equal to a given triangle, and have one of its angles equal to a given rectilineal angle.

Página 4 - Let it be granted that a straight line may be drawn from any one point to any other point.

Página 33 - F, which is the common vertex of the triangles: that is », together with four right angles. Therefore all the angles of the figure, together with four right angles are equal to twice as many right angles as the figure has sides.

Página 62 - If a straight line be divided into two equal parts, and also into two unequal parts; the rectangle contained by the unequal parts, together with the square of the line between the points of section, is equal to the square of half the line.

Página 22 - If from the ends of a side of a triangle, there be drawn two straight lines to a point within the triangle, these shall be less than the other two sides of the triangle, but shall contain a greater angle.

Página 58 - If there be two straight lines, one of which is divided into any number of parts, the rectangle contained by the two straight lines is equal to the rectangles contained by the undivided line, and the several parts of the divided line.

Página 146 - ... may be demonstrated from what has been said of the pentagon : and likewise a circle may be inscribed in a given equilateral and equiangular hexagon, and circumscribed about it, by a method like to that used for the pentagon.

Página 194 - If two triangles have one angle of the one equal to one angle of the other and the sides about these equal angles proportional, the triangles are similar.

Página 2 - A circle is a plane figure contained by one line, which is called the circumference, and is such, that all straight lines drawn from a certain point within the figure to the circumference are equal to one another : 16.

Página 69 - To divide a given straight line into two parts, so that the rectangle contained by the whole, and one of the parts, may be equal to the square of the other part.